Automatic intravenous fluid flow control device

Inactive Publication Date: 2011-09-08
WANG HSIEN TSUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]In one aspect of the invention fluid may be stored in the inner cylinder to increase weight of the lower float member so as

Problems solved by technology

However, the prior IV flow controlling device suffers from a number of disadvantages.
Unfortunately, it may be inclined or may be permanently deformed due to compression.
Thus, the float member may malfunction.

Method used

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  • Automatic intravenous fluid flow control device
  • Automatic intravenous fluid flow control device
  • Automatic intravenous fluid flow control device

Examples

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Embodiment Construction

[0029]Referring to FIGS. 1 to 8, an automatic intravenous (IV) fluid flow control device in accordance with a first preferred embodiment of the invention comprises the following components as discussed in detail below.

[0030]A drip mechanism 100 is comprised of a drip chamber 20 and a drip assembly 30. A float valve 10 is provided in the drip mechanism 100. The drip chamber 20 is formed of PVC (Polyvinylchloride) or other flexible plastic material. The drip assembly 30 is formed of ABS (Acrylonitrile Butadiene Styrene) or other hard plastic material.

[0031]The drip chamber 20 comprises a reservoir 21, an inlet tube 22 at one (top) end of the reservoir 21, and a flared lower portion 23 having an open bottom 231. An inlet tubing 40 has one enlarged end 41 secured to one end of the reservoir 21. The inlet tubing 40 is in fluid communication with the reservoir 21 via the inlet tube 22. The inlet tubing 40 is connected to an IV fluid bag (not shown).

[0032]The drip assembly 30 comprises an ...

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Abstract

An intravenous flow control device includes a flexible drip chamber (20) comprising a fluid entrance (22) and an open bottom (231); a rigid drip assembly (30) secured to the drip chamber (20) and comprising an inner cylinder (31) having a bottom exit (331); and an internal float valve (10) comprising a fastening member (12) including a hollow inner cylinder (121), a plunger (11) slidably disposed through the inner cylinder (121), an upper float member (15) secured to one end of the plunger (11), a lower float member (13) secured to the other end of the plunger (11), and a block member (14) secured to the lower float member (13) for sealingly blocking the exit (331). Fluid flows into the inner cylinder (31) for accumulation so as to float the block member (14), thereby unblocking the exit (331) and moving the plunger (11) upward.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of Invention[0002]The invention relates to intravenous (IV) fluid flow control and more particularly to an automatic IV fluid flow control device with improved characteristics.[0003]2. Description of Related Art[0004]There are many devices known for controlling the flow of IV fluids to a patient. For example, U.S. Pat. No. 6,569,116 discloses an IV flow controlling device disposed in a drip chamber having an exit in a bottom, the flow controlling device comprising a flexible float member having a specific gravity less than one and an outer diameter smaller than a diameter of the drip chamber, the float member including an open upper portion and a hemi-spherical bottom portion, a wall thickness of the hemi-spherical bottom portion being thinner than a wall thickness of the upper portion of the float member, wherein the float member is submerged as fluid fills the drip chamber, fluid flowing through the exit of the drip chamber causing the flo...

Claims

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Application Information

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IPC IPC(8): A61M5/175
CPCA61M5/1411A61M5/40
InventorWANG, HSIEN-TSUNGCHENG, WAN-CHANG
OwnerWANG HSIEN TSUNG